Modules in Rust
My project structure looks like this:
src/main.rs
--- game.rs
--- game_state.rs
Inside game.rs has:
mod game_state;
And inside game_state.rs has
mod game;
But this Returns me an error:
file not found for module game_state
3 answers
If you want game.rs and game_state.rs to be in the same root directory as main.rs, you must declare the modules in the main.rs file itself.
// src/main.rs
mod game;
mod game_state;
Modules can only reference submodules if they are directories, so if you declare the submodule mod game_state; in the file game.rs, you must create the directory game/, move the file game.rs to game/mod.rs and create a new file/module game/game_state.rs.
src/game/
└──── mod.rs
└──── game_state.rs
src/main.rs
Despite being quite flexible, the module structure of the Rust language is a little confusing and intimidating but there are already discussions that try to improve this situation.
Every file import goes to the main file, i.e. the parent of all:
Main.rs
mod game;
mod game_state;
To refer to game within game_state, you can use:
Game_state.rs
use super::game;
That is, the same as accessing the parent Module (main.rs in fact is a module).
If you want sub-modules similar to main.rs, which can import other files, create a folder, type:
/src/
└── ./game_state/
└── ./mod.rs
But this Returns me an error: file not found for module game_state
This structure expects a file at: game_state/game.rs